Bit-guide.



No. 654,010. Patented July l7, I900. F. A. LAMBERG.

BIT GUIDE.

(Application filed Aug. 16. 1899.)

(No Model.) 2 Shaets-Sheet l.

WITNESSES A TTOHNEYS N0. 654,0"). Patented-July 17, I900. F. A. LAMBERG.

BIT GUIDE.

(Application filed Aug. 16, 1599.)

(No Model.) 2 Sheets-Sheet 2.

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UNITED STATES PATENT Grains.

FREDERICK ADOLPIIUS LAMBERG, OF HOT SPRINGS, ARKANSAS.

BIT-GUIDE.

SPECIFICATION forming part of Letters Patent No. 654,010, dated July 17, 1900.

Application filed August 16, 1899- To all whom it may concern:

Be it known that I, FREDERICK ADoLPHUs LAMBERG, of Hot Springs, in the county of Garland and State of Arkansas,have invented a new and Improved Bit-Guide, of which the following is a full, clear, and exact description.

My invention relates to devices for holding and guiding bits which are used in ordinary braces,and comprises the novel features hereinafter described and claimed.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the views.

Figure 1 shows my device secured to the side of a bench or table and with a bit and brace shown in dotted lines as in use. Fig. 2 is a view of my device, taken at right angles to Fig. 1. Fig. 3 is a view similar to Fig. l with the parts applied in diderent positions. Fig. 4 is a view similar to Fig. 1, showing an auxiliary guide in use. Fig. 5 is a top plan view of the device as shown in' Fig. 4, and Fig. 6 is a section taken upon the line 6 6 in Fig. 4.

The object of my invention is to provide a mechanism which is small and easily transported, which may be secured to the side of a bench or table, and which will serve for accurately guiding a boring-bit and brace, so that a series of holes may be bored at the same angle or a hole maybe bored at any desired angle.

My device is mounted upon a base piece or plate A, which is provided with a central longitudinally-extending slot at, adapted to receive a clamping-bolt II. This clamping-bolt is ordinarily passed through the side or top of the table or bench and is provided with a hand-operated nut H, said nut being provided with a lever-arm, so that it may be tightly turned down and firmly secured to the device. Then the device is secured to a table or bench in this manner, it is preferred that a plate J be placed on the opposite side of the board to which the device is secured, thus providinga large bearing-surface for the head of the bolt.

Upon one end of the plate A is a transversely-extending head A, consisting of a flange which projects at right angles to the Serial No. 727,433. (No model.)

body of the plate and an additional flange se cured to the outer, edge thereof and extend ing in a plane substantially parallel with the body of the frame. In the center of "the length of the head A is a boss '0, containing a hemispherical recess adapted to receive one side of a ball formed upon the member which carries the guide. The plate B, which is similar in construction to the part A of the plate A, is secured thereto by means of a curved hook a, which projects from one end of the head A and which passes through a' hole 5 in one end of the plate B. This looks one end of the plate in place, while the other end is secured by means of a clamping-bolt G, which is provided with a clamping-nut G, having a lever-arm. The plate B is also provided with a hemispherical recess, which lies exactly opposite the similar recess in the head A.

The bit-guide is formed upon one end of a bar or post D, which is provided at one end with a ball or sphere D of such size as to fit within the recess formed in the head A and plate B. Upon the other end of the bar or post D is formed a transversely-extending head or plate D, which is provided with a longitudinally-extending groove in its outer face semicircularin cross-section and adapted to receive the shank of the bit. The bit is held in place by means of a plate E, which is provided with a similar and registering recess adapted to receive the shank of the bit and is secured to the plate D by means of cars e cl, formed upon the two parts and provided with holes to receive pins 6. One of the pins 6 is readily removable, so that the outer plate E may be swung to one side to admit the bit-shank.

The method of supporting the bit-guide by means of a ball-and-socket joint permits the same to be both rotated and supported in different angular positions, so that it may be used to hold the bit in any of these positions.

WVhen it is desired to get a greater range of positions, an auxiliary device, such as shown in Figs. 4 and 5, may be used. This device comprises a rod or shank I, which is of such size as to fit within the hole'formed by the two semicircular recesses in the plates D and E. This shank may be secured in place by means of a set-screw F, which passes through Ioo the plate E and is adapted to engage by its inner end the body of the shank or rod 1. One end of this rod is provided with a head similar in construction to that just described and by which the bit may be guided.

A scale K, which will indicate the angular position of the bit, is constructed upon either the head A or the plate B. This scale K is shown in Fig. 6 as applied to the plate B. A scale of the same sort may be applied to the ends of the plate D and the complementary plate E, if desired. In either case the ball or sphere D or the shaft 1, whichever is being used, is provided with a reference-mark by which the reading may be determined. By this means the guide may be set at any angular position desired and a hole truly bored or a number of holes bored all at the same angle.

It is evident that by this device, and especially when the auxiliary device shown in Figs. 4 and 5 is used, a number of holes may be bored all at the same angle or any hole may be bored at any desired angle.

Having thus fully described my invention, I claim as new and desire to secure by Letters Patent- 1. In a bit-guide, the combination with a base-plate adapted to be secured to a bench or other support and provided with a spherical socket, of a two-part block having registering recesses forming a bit receiver and holder, one of the parts of the receiver and holder being provided with a stem terminating in a ball fitting in the socket of the baseplate, substantially as described.

2. In a bit-guide, the combination with a base-plate adapted to be secured to a support and provided with a spherical socket, of a bit-guide, consisting of a stem terminating in aballfitting in the socket of the baseplate and provided with a head having a semicircular groove in one face, and a plate having a semicircular groove in one face registering with the groove of the head, the head and plate being provided with apertured ears to receive pins, by which the parts are secured together, substantially as described.

3. A bitguide, comprising a base -plate adapted to be secured to a bench or other support and provided with a two-part spherical socket, one of which parts is'provided with a scale, and a two-part bit receiver and holder, one of the parts of the receiver and holder being provided with a stem terminating in a hall titt-in g in the socket of the base-plate and provided with a reference-m ark,substantially as described.

4:. A bitguide, comprising a baseplate adapted to be secured to a bench or other support, a two-part bit receiver and holder, one of the said parts being provided with a stem, and a ball-and-socket-joint connection between the stem of the bit receiver and holder and the base-plate, the members of the ball? and-socket joint having scales thereon for indicating their relative angular positions, substantially as described.

FREDERICK ADOLPIIUS LAMBERG.

Nitnesses:

LYMAN T. HAY, S. A. STILL. 

